Discussion :: Networking - Section 5 (Q.No.1)
|Vana.Tatarao said: (Feb 5, 2015)|
|Synchronous, 4800 bps modem that uses 8-DPSK.
Each symbol is a tri-bit and duration of each symbol is 0.625 ms.
4-phase idle code: Sequences through four of the eight possible shifts allows receiver to recover carrier and clock timing information rapidly.
4-phase test word: Allows adaptive equalizer in the receive modem to adjust to its final settings.
8-phase initialization period: Prepares the descrambler circuits for 8-phase operation.
The entire training sequence requires 48.75 ms (=78*?).
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